This book contains a set of instructions for building a machine to work in that most elusive of places; inner space. The beauty of this book is that the material and tools are free; one's consciousness and one's imagination are all that are required. Like a path-working, it is designed to expand one's understanding of self and the cosmos. Also included are some preliminary workings and a set of exercises to help develop the will and the imagination to get the machine working properly. The uses to which this machine can be put are only limited by one's imagination. So get building today and explore inner space like a true Psychonaut Originally published as a small booklet in a limited edition in the eighties, this is the revised version with a short introduction and improved illustrations.